Process of forming angular bosses.



C. WALES.

P300388 05 FORMING ANGULAR BOSS Pa'ent Dec. 22, 191% APPLIOATIOH FILEDJULY 19, 1913.

UNETED STATES E ATENT CHARLES WALES, 03' NEW HAVEN, CONNECTICUT.ASSIGNOR TO TL- IE TWHITE ADDiNG MACHZWE COMPANY, OF NEW HAVEN.CONNECTICUT.

NECTICU'I.

Application filed July 18, 1913.

To (1. 5 "20720211. may mac-cm lie it known that l. CHARLES Wanns. acitizen of the Jnitetl States. residing at New Haven. Nov. llavencounty. state of Con nocticnt. have invented certain new and use.- fulImprovements in. Proeesses of Forming Angular Bossos. of which thefollowing is a full. clear, ancl exact.- description.

My invention relates to irnprovoinents in the process of forming angularbosses, and has for its object to provide a process for forming from ametal blank an angular boss integral with ahub or base, in aninexpensive and expeditious manner It lurthor has for its object toprovide a process in whih the bosses tormocl shall be uniform.

The following is a description of a process embodying my invention andcertain apparatus used in carrying out the, same. refer ence being badto the accompanying drawings. in x hich Fig'u re 1 shows a sitloelevation of the blank to be trvatetl. Fig. 1 shows a partially formedblank anrl in partial soot-ion. dies for completinp the forming of theangular boss. Fig. is a view partially in sitlo elevation and partiallyin section. showing; the prodnot after completion, in conjunction withthe clies for performing the last stop. Fig.

2*- is a bottom view of the upper (lie, shown in Figv 1. Fig. 3 is planview of the lower portion of Fig. l showing tho-bod oi the press withthe partiallv l ornieil blank thoroon. Fig. =l shows the be l o? thepress with the completely l ormetl product thereon. Fig. 5 shows in planview the eomploteil product with a lover or wrench upon the conipletelvtormeil angular boss. Fig. 6 is a side. elevation of time same.

srvoovo a lie slightly w thin tho st iia'ht sirlos ot the h 1' wherethov a o clos' axis of (no blank. After that L mo. turned. I placeSpecification of Letters Patent.

A ooRPoRArron or con- PRCCESS OF FORMING ANGULAR BUS SE3.

Patented net. 22. 75914.

Serial No. 779,965.

are removed from tho axis of the bla nl; by a distance slightly greaterthan thr- (listanco between saicl axis and the bottom of the groove 9.The successive into-rim angles of i") the recess in the (lie arevpreterablv eriual so as to form a. regular polvaon. 'lho grown.particularlv when its ra lius is slightly loss than the (listanorhetwvon the axis of the blank and the straight sirlos oi? the lmas to heformed. permits the roa 'lv shearing away of the portions of the rrtluool llCZIKl above the groove. the-rebv enabling mo form a ho. withoutmilling or machining and in anoiperlitious and ii'iexponsivo manner."all the" bossvs hoingot uniform size arul shape. The blank providedwith a longitudinal bore and the (lie is provided with a. pin which ontors said hora. fitting tho saino snug-iv. so as to Center the zlioralalivel to the blank.

In tho clra 'ings. l is the metal blank hav ing: a central bore 7 1 isthe blank after the groove 2 has been turned therein ancl with thereduced hearl 3 sides parallel to the axis of tho hlanl; as it lies uponthe (lie beil aru sroaratorl 'i'roi axis of the die by a listan e ghllvthan the radius of the groow "'3. mum rarlins oi" the rei'ioss equal tothus 0? the heail 3.

The blank 1. a S tar tho recs have been forrnml thereon. is die bail -"land tho plunger downward. vit i The port ons of avvav sinuiltaneou liesot' tho boss i: movement of tl th suorossi int lornml lsv I .jacentplanes along which the cutting is done' should be e ual. If this. isdone and the planes are al equally distanced from the axis of the blank,the boss formed will be in the shape of a regular polygon.

Figs. andfi show a lever or wrench 8 apv plied to the angular boss.-

What I claim is: 1. The process of forming a polygonal boss upon a metalbase which consists in cutting adjacent to oneend of a blank an annulargroove having a diameter nearly equal to the smallest dimension ofthedesired boss, and shearing away portions of the metal of said blanksimultaneously on one side of said groove along planes adjacent andapproximately tangential to but not intersecting the-bottom of saidgroove 20 [712. The process of forming a polygonal and parallel to .aline perpendicular to the plane in which said annular groove lies.

1' boss upon a metal base which consists in cutting adjacent to one endof a blank an annular groove having a diameter nearly equal tothesmallest dimension of the desired boss and shearing away portions of the'inetal of said blank simultaneously on one side of said groove alongplanes adjacent and approximately tangential to but not intersecting thebottom of said groove v and parallel to a line perpendicular-t0 theplane in which said annular groove lies, the

successive interior angles between adjacent planes being equal.

- 3. The process of forminga polygonal said groove- 4sThe process,offorming a polygonal boss upon a metal piece which consists in formingupon a blank a head'of smaller eliameter'jhan. said blank and having anannular groove at its base the bottom of said groove having a diameternearly equal .to the smallest diameter of'the desired boss,

and then shearing away portions of said metal simultaneously alongplanes perpendicular to'the plane in which said groove lies .andadjacent and approximately tangential to but notinterSecting the bottomof said groove.

' CHARLES WALES. W'tnesses:

EDWARD S. SWIFT, L. HARTLAND.

